Joomla 2.5: Fix lỗi Refresh Manifest Cache failed: Extension is not currently installed

In this tutorial we will show you how to fix the “manifest cache” error in Joomla! You may be receiving errors after upgrading to Joomla 2.5.x that look similar to this:
Refresh Manifest Cache failed: Extension is not currently installed or this: Error on updating manifest cache: (type, element, folder, client)

How to fix the Manifest Cache error:

Step 1: Login to the Joomla Admin section.

Joomla 2.5: Fix Refresh Manifest Cache failed: Extension is not currently installed

Step 2: Roll your mouse over the Extensions option, and click Extension Manager.

Joomla 2.5: Fix Refresh Manifest Cache failed: Extension is not currently installed

Step 3: Click the Discover tab, then the Purge Cache button.

Joomla 2.5: Fix Refresh Manifest Cache failed: Extension is not currently installed

Step 4: Now, click the Database tab, then the Fix button.

Joomla 2.5: Fix Refresh Manifest Cache failed: Extension is not currently installed

You will see a notification stating “Purged discovered extensions,” and your error should go away.
Congratulations, now you know how to fix the manifest cache error after upgrading to Joomla 2.5.x!

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